/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2020, Arnaud Roques
 *
 * Project Info:  http://plantuml.com
 * 
 * If you like this project or if you find it useful, you can support us at:
 * 
 * http://plantuml.com/patreon (only 1$ per month!)
 * http://plantuml.com/paypal
 * 
 * This file is part of PlantUML.
 *
 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * PlantUML distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
 * License for more details.
 *
 * You should have received a copy of the GNU General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
 * USA.
 *
 *
 * Original Author:  Arnaud Roques
 *
 *
 */
package net.sourceforge.plantuml.board;

import java.awt.geom.Dimension2D;
import java.awt.geom.Rectangle2D;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;

import net.sourceforge.plantuml.AnnotatedWorker;
import net.sourceforge.plantuml.Dimension2DDouble;
import net.sourceforge.plantuml.FileFormatOption;
import net.sourceforge.plantuml.ISkinParam;
import net.sourceforge.plantuml.Scale;
import net.sourceforge.plantuml.SkinParam;
import net.sourceforge.plantuml.UmlDiagram;
import net.sourceforge.plantuml.UmlDiagramType;
import net.sourceforge.plantuml.command.CommandExecutionResult;
import net.sourceforge.plantuml.core.DiagramDescription;
import net.sourceforge.plantuml.core.ImageData;
import net.sourceforge.plantuml.graphic.InnerStrategy;
import net.sourceforge.plantuml.graphic.StringBounder;
import net.sourceforge.plantuml.graphic.TextBlock;
import net.sourceforge.plantuml.style.ClockwiseTopRightBottomLeft;
import net.sourceforge.plantuml.style.PName;
import net.sourceforge.plantuml.style.SName;
import net.sourceforge.plantuml.style.Style;
import net.sourceforge.plantuml.style.StyleSignature;
import net.sourceforge.plantuml.svek.TextBlockBackcolored;
import net.sourceforge.plantuml.ugraphic.ImageBuilder;
import net.sourceforge.plantuml.ugraphic.ImageParameter;
import net.sourceforge.plantuml.ugraphic.MinMax;
import net.sourceforge.plantuml.ugraphic.UGraphic;
import net.sourceforge.plantuml.ugraphic.ULine;
import net.sourceforge.plantuml.ugraphic.UStroke;
import net.sourceforge.plantuml.ugraphic.UTranslate;
import net.sourceforge.plantuml.ugraphic.color.HColor;
import net.sourceforge.plantuml.ugraphic.color.HColorUtils;

public class BoardDiagram extends UmlDiagram {

	private final List<Activity> activities = new ArrayList<Activity>();

	public DiagramDescription getDescription() {
		return new DiagramDescription("Board");
	}

	public BoardDiagram() {
		super(UmlDiagramType.BOARD);
	}

	@Override
	protected ImageData exportDiagramInternal(OutputStream os, int index, FileFormatOption fileFormatOption)
			throws IOException {
		final Scale scale = getScale();

		final double dpiFactor = scale == null ? getScaleCoef(fileFormatOption) : scale.getScale(100, 100);
		final ISkinParam skinParam = getSkinParam();
		final int margin1 = SkinParam.zeroMargin(10);
		final int margin2 = SkinParam.zeroMargin(10);
		final Style style = StyleSignature.of(SName.root, SName.document, SName.mindmapDiagram)
				.getMergedStyle(skinParam.getCurrentStyleBuilder());

		HColor backgroundColor = style.value(PName.BackGroundColor).asColor(skinParam.getIHtmlColorSet());
		if (backgroundColor == null) {
			backgroundColor = HColorUtils.transparent();
		}

		final ClockwiseTopRightBottomLeft margins = ClockwiseTopRightBottomLeft.margin1margin2(margin1, margin2);
		final String metadata = fileFormatOption.isWithMetadata() ? getMetadata() : null;

		final ImageParameter imageParameter = new ImageParameter(skinParam.getColorMapper(), skinParam.handwritten(),
				null, dpiFactor, metadata, "", margins, backgroundColor);

		final ImageBuilder imageBuilder = ImageBuilder.build(imageParameter);

		TextBlock result = getTextBlock();

		result = new AnnotatedWorker(this, skinParam, fileFormatOption.getDefaultStringBounder(getSkinParam()))
				.addAdd(result);
		imageBuilder.setUDrawable(result);

		return imageBuilder.writeImageTOBEMOVED(fileFormatOption, seed(), os);
	}

	private TextBlockBackcolored getTextBlock() {
		return new TextBlockBackcolored() {

			public void drawU(UGraphic ug) {
				drawMe(ug);
			}

			public Rectangle2D getInnerPosition(String member, StringBounder stringBounder, InnerStrategy strategy) {
				return null;
			}

			public Dimension2D calculateDimension(StringBounder stringBounder) {
				final double width = 200;
				final double height = 200;
				return new Dimension2DDouble(width, height);

			}

			public MinMax getMinMax(StringBounder stringBounder) {
				throw new UnsupportedOperationException();
			}

			public HColor getBackcolor() {
				return null;
			}
		};
	}

	private void drawMe(final UGraphic ug) {
		UGraphic mug = ug;
		for (Activity activity : activities) {
			activity.drawMe(mug);
			mug = mug.apply(UTranslate.dx(activity.getFullWidth()));
		}

		final ULine line = ULine.hline(getFullWidth());

		for (int i = 0; i < getMaxStage(); i++) {
			final double dy = (i + 1) * PostIt.getHeight() - 10;
			ug.apply(HColorUtils.BLACK).apply(new UStroke(5, 5, 0.5)).apply(UTranslate.dy(dy)).draw(line);
		}
	}

	private double getFullWidth() {
		double width = 0;
		for (Activity activity : activities) {
			width += activity.getFullWidth();
		}
		return width;
	}

	private int getMaxStage() {
		int max = 0;
		for (Activity activity : activities) {
			max = Math.max(max, activity.getMaxStage());
		}
		return max;
	}

	private Activity getLastActivity() {
		return this.activities.get(this.activities.size() - 1);
	}

	public CommandExecutionResult addLine(String plus, String label) {
		if (plus.length() == 0) {
			final Activity activity = new Activity(this, label, getSkinParam());
			this.activities.add(activity);
			return CommandExecutionResult.ok();
		}
		getLastActivity().addRelease(plus.length(), label);
		return CommandExecutionResult.ok();
	}

}
